366 lines
8.7 KiB
C
366 lines
8.7 KiB
C
/*-
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* Copyright (c) 2012 Cisco Systems, Inc.
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* All rights reserved.
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*
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* This software was developed by Bjoern Zeeb under contract to
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* Cisco Systems, Inc..
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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static char *testcase;
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static int accepts;
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static int debug;
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static u_int fib = -1;
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static u_int reflectfib = -1;
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static uint16_t port = 6666;
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static char *addr;
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static int nostart;
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static int
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reflect_conn(int s, char *buf, size_t buflen, ssize_t l, struct sockaddr *sa,
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socklen_t salen)
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{
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ssize_t m;
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if (l == -1)
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err(EX_OSERR, "read()");
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if (l == 0)
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errx(EX_NOINPUT, "EOF");
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if ((size_t)l > (buflen - 1))
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errx(EX_DATAERR, "Input too long");
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/* Nuke the \n from echo | netcat. */
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buf[l-1] = '\0';
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/*
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* Match three cases: (1) START, (2) DONE, (3) anything else.
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* For anything but START and DONE we just reflect everything.
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*/
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/*
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* We expected a "START testcase" on first connect. Otherwise it means
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* that we are out of sync. Exit to not produce weird results.
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*/
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if (accepts == 0 && nostart == 0) {
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if (strncmp(buf, "START ", 6) != 0)
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errx(EX_PROTOCOL, "Not received START on first "
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"connect: %s", buf);
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if (l < 8)
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errx(EX_PROTOCOL, "START without test case name: %s",
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buf);
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if (strcmp(buf+6, testcase) != 0)
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errx(EX_PROTOCOL, "START test case does not match "
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"'%s': '%s'", testcase, buf+6);
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}
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/* If debug is on, log. */
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if (debug > 0)
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fprintf(stderr, "<< %s: %s\n", testcase, buf);
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if (reflectfib != (u_int)-1)
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l = snprintf(buf, buflen, "FIB %u\n", reflectfib);
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/* If debug is on, log. */
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if (debug > 0) {
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buf[l-1] = '\0';
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fprintf(stderr, ">> %s: %s\n", testcase, buf);
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}
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/* Reflect data with \n again. */
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buf[l-1] = '\n';
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if (sa != NULL) {
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m = sendto(s, buf, l, 0, sa, salen);
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} else
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m = write(s, buf, l);
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/* XXX This is simplified handling. */
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if (m == -1 && sa != NULL && errno == EHOSTUNREACH)
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warn("ignored expected: sendto(%s, %zd)", buf, l);
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else if (m == -1 && (sa == NULL || errno != EHOSTUNREACH))
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err(EX_OSERR, "write(%s, %zd)", buf, l);
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else if (m != l)
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err(EX_OSERR, "short write(%s, %zd) %zd", buf, l, m);
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accepts++;
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/* See if we got an end signal. */
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if (strncmp(buf, "DONE", 4) == 0)
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return (-2);
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return (0);
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}
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static int
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reflect_tcp6_conn(int as)
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{
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char buf[1500];
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ssize_t l;
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int error, s;
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s = accept(as, NULL, NULL);
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if (s == -1)
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err(EX_OSERR, "accept()");
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l = read(s, buf, sizeof(buf));
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error = reflect_conn(s, buf, sizeof(buf), l, NULL, 0);
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close(s);
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return (error);
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}
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static int
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reflect_udp6_conn(int s)
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{
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char buf[1500];
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struct sockaddr_in6 from;
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socklen_t fromlen;
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ssize_t l;
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int error;
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fromlen = sizeof(from);
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l = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&from,
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&fromlen);
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#if 0
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if (l != -1) {
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rc = connect(s, (struct sockaddr *)&from, fromlen);
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if (rc == -1) {
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if (inet_ntop(PF_INET6, &from, buf, sizeof(buf)) == NULL)
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buf[0] = '\0';
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err(EX_OSERR, "connect(%d, %s, %u)", s, buf, fromlen);
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}
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}
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#endif
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error = reflect_conn(s, buf, sizeof(buf), l, (struct sockaddr *)&from,
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fromlen);
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#if 0
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if (l != -1) {
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/* Undo the connect binding again. */
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fromlen = sizeof(from);
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bzero(&from, fromlen);
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from.sin6_len = fromlen;
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from.sin6_family = AF_INET6;
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from.sin6_port = htons(port); /* This only gives us a ::1:port ::1:port binding */
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rc = connect(s, (struct sockaddr *)&from, fromlen);
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if (rc == -1) {
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if (inet_ntop(PF_INET6, &from.sin6_addr, buf,
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sizeof(buf)) == NULL)
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buf[0] = '\0';
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err(EX_OSERR, "un-connect(%d, %s, %u)", s, buf, fromlen);
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}
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}
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#endif
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return (error);
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}
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static int
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reflect_6(int domain, int type)
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{
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struct sockaddr_in6 sin6;
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fd_set rset;
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int i, rc, s;
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/* Get us a listen socket. */
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s = socket(domain, type, 0);
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if (s == -1)
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err(EX_OSERR, "socket()");
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/*
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* In case a FIB was given on cmd line, set it. Let the kernel do the
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* the bounds check.
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*/
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if (fib != (u_int)-1) {
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rc = setsockopt(s, SOL_SOCKET, SO_SETFIB, &fib, sizeof(fib));
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if (rc == -1)
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err(EX_OSERR, "setsockopt(SO_SETFIB)");
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}
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/* Allow re-use. Otherwise restarting for the next test might error. */
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i = 1;
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rc = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
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if (rc == -1)
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err(EX_OSERR, "setsockopt(SO_REUSEADDR)");
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i = 1;
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rc = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &i, sizeof(i));
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if (rc == -1)
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err(EX_OSERR, "setsockopt(SO_REUSEPORT)");
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/* Bind address and port or just port. */
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sin6.sin6_len = sizeof(sin6);
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sin6.sin6_family = AF_INET6;
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sin6.sin6_port = htons(port);
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sin6.sin6_flowinfo = 0;
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bzero(&sin6.sin6_addr, sizeof(sin6.sin6_addr));
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if (addr != NULL) {
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rc = inet_pton(PF_INET6, addr, &sin6.sin6_addr);
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if (rc == 0)
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errx(EX_USAGE, "inet_pton()");
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else if (rc == -1)
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err(EX_OSERR, "inet_pton()");
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else if (rc != 1)
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errx(EX_SOFTWARE, "inet_pton()");
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}
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sin6.sin6_scope_id = 0;
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rc = bind(s, (struct sockaddr *)&sin6, sizeof(sin6));
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if (rc == -1)
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err(EX_OSERR, "bind(%d)", s);
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if (type == SOCK_STREAM) {
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rc = listen(s, port);
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if (rc == -1)
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err(EX_OSERR, "listen(%d, %u)", s, port);
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}
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/*
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* We shall never do more than one connection in parallel so can keep
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* it simple.
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*/
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do {
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FD_ZERO(&rset);
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FD_SET(s, &rset);
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rc = select(s + 1, &rset, NULL, NULL, NULL);
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if (rc == -1 && errno != EINTR)
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err(EX_OSERR, "select()");
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if (rc == 0 || errno == EINTR)
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continue;
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if (rc != 1)
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errx(EX_OSERR, "select() miscounted 1 to %d", rc);
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if (!FD_ISSET(s, &rset))
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errx(EX_OSERR, "select() did not return our socket");
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if (type == SOCK_STREAM)
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rc = reflect_tcp6_conn(s);
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else if (type == SOCK_DGRAM)
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rc = reflect_udp6_conn(s);
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else
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errx(EX_SOFTWARE, "Unsupported socket type %d", type);
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} while (rc == 0);
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/* Turn end flagging into no error. */
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if (rc == -2)
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rc = 0;
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/* Close listen socket. */
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close(s);
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return (rc);
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}
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static int
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reflect_tcp6(void)
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{
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return (reflect_6(PF_INET6, SOCK_STREAM));
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}
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static int
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reflect_udp6(void)
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{
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return (reflect_6(PF_INET6, SOCK_DGRAM));
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}
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int
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main(int argc, char *argv[])
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{
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long long l;
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char *dummy, *afname;
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int ch, rc;
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afname = NULL;
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while ((ch = getopt(argc, argv, "A:dF:f:Np:t:T:")) != -1) {
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switch (ch) {
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case 'A':
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addr = optarg;
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break;
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case 'd':
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debug++;
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break;
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case 'F':
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l = strtoll(optarg, &dummy, 10);
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if (*dummy != '\0' || l < 0)
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errx(EX_USAGE, "Invalid FIB number");
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fib = (u_int)l;
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break;
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case 'f':
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l = strtoll(optarg, &dummy, 10);
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if (*dummy != '\0' || l < 0)
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errx(EX_USAGE, "Invalid FIB number");
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reflectfib = (u_int)l;
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break;
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case 'N':
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nostart=1;
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break;
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case 'p':
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l = strtoll(optarg, &dummy, 10);
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if (*dummy != '\0' || l < 0)
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errx(EX_USAGE, "Invalid port number");
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port = (uint16_t)l;
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break;
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case 't':
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testcase = optarg;
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break;
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case 'T':
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afname = optarg;
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break;
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case '?':
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default:
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errx(EX_USAGE, "Unknown command line option at '%c'",
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optopt);
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/* NOTREACHED */
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}
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}
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if (testcase == NULL)
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errx(EX_USAGE, "Mandatory option -t <testcase> not given");
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if (afname == NULL)
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errx(EX_USAGE, "Mandatory option -T <afname> not given");
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if (strcmp(afname, "TCP6") == 0)
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rc = reflect_tcp6();
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else if (strcmp(afname, "UDP6") == 0)
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rc = reflect_udp6();
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else
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errx(EX_USAGE, "Mandatory option -T %s not a valid option",
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afname);
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return (rc);
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}
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